GZC3030,GZC4040,GZC5050,GZC6060 CNC high speed plate drilling machine I. Machine application:Gantry movable CNC drilling & ... ,tapping and slight-milling ,can clamp carbide drill inner-coolingor high-speed metal twist drill outer cooling . Mainly used in the processing of ... easily. Spindle is driven by high-power spindle servo motor through synchronous belt, spindle rotation speed 10 ~3000r/min, a wide ...